Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...
Patent
1985-10-24
1988-08-02
Mills, Catherine L.
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Having -c-, wherein x is chalcogen, bonded directly to...
47 576, 514425, 514469, 514538, A01N 2502
Patent
active
047614234
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to dressing additives, more particularly to seed dressing additives.
The invention is directed to a seed dressing additive which comprises an oil in order to adhere the active ingredient(s) responsible for the desired effect(s) onto the parts of the plant (seeds, tubers etc.) and to form a protecting coating.
BACKGROUND OF THE INVENTION
The success of plant cultivation is endangered by several diseases and pests (e.g. fungal diseases, insects, mammals etc.). The chewing of seeds and seedlings and the diseases of the growing plant result in serious crop damage. The germinating seeds, the tubers and some leafed plants are the most unprotected and any damage might become fatal. Some further diseases caused by the infection of the seed might appear on the crops (e.g. rust and mildew diseases of cereals).
In order to avoid the above mentioned serious damage and to ensure the foodstuff-demands of the population, seed dressing (also referred to as dressing) has been used for a long time. The essential feature of the said process is that the propagative organs of the plant are contacted with chemical substances (referred to furtheron as plant protecting agents or pesticides) which destroy the pests dwelling on the seed or in the vicinity thereof in the soil. The said plant protecting agents provide healthy seeds on the one hand while on the other they kill the soil dwelling sucking-chewing pests. Other known plant protecting agents are adsorbed by the plant and provide protection to the plant for a shorter or longer period of time.
It is an essential feature of the seed dressing procedure that the propagative material and the plant protecting agent should be in contact for a prolonged period of time and the said contact should be maintained when the propagative material enters the soil.
Nowadays in seed dressing technology additives which promote the adhesion of the fungicide and enhance seed dressing are widespreadly used. The users particularly demand additives which posses high adhesive strength, color intensively, dry rapidly and contain no active ingredient because only such additives are suitable for seed dressing wherein the economy in the use of materials is taken into consideration and the rate of application is adapted to the degree of infection.
The known seed dressing methods are as follows:
(1) Wet seed dressing. The pesticide is suspended or--if possible--dissolved in water. The seeds are soaked in this mixture, thereafter filtered and dried. Thus good contact is made between the pesticide and the seeds but the amount of the active pesticidal ingredient which adheres is often lower than that required for the safe protection of the seeds. Further drawbacks are the complicated character of the process, the high labor demand and the costs of drying. For these reasons the said process is not used in practice any more.
(2) Powder dressing. The object of this method is the elimination of the drawbacks of wet technology. The essence of the process is that the active ingredient is ground to a fine powder and a powdered additive is added which promotes adhesion. The process involves, however, serious difficulties. The powder is namely adhered only to the external surface of the propagating material and generally avoids the germ homozygotes. Therefore in the absence of moisture the substance capable of absorption can penetrate the seeds only after sowing under the effect of the humidity of the soil. The adhesion to the dry seeds is weak and therefore the required amount of active ingredient can be applied only with difficulties. Moreover a great part of the pesticide dusts off during treatment, storage and transport of the seeds, consequently it can not exert the desired effect and constitutes health hazards to the handling staff as well.
(3) Moistened seed dressing. From the active ingredient a suspension is prepared with such an amount of water which can be still absorbed by the seeds without increasing the moisture content during storage over the still allow
REFERENCES:
patent: 4372080 (1983-02-01), Rushing
Karsai Jozsef
Kis Gyorgy
Kovats Ferenc
Marmarosi Katalin
ngyan Sandor
Chinoin Gyogyszer - es Vegyeszeti Termekek Gyara Rt.
Dubno Herbert
Mills Catherine L.
Myers Jonathan
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